Effects of nanocrystal formation on the soft magnetic properties of Fe-based bulk metallic glasses

J. E. Gao, H. X. Li, Zengbao Jiao, Y. Wu, Y. H. Chen, T. Yu, Z. P. Lu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

51 Citations (Scopus)

Abstract

We developed several Fe-based bulk metallic glasses with a unique combination of large glass-forming ability and excellent soft magnetic properties by minor doping of Cu in the Fe76C7.0Si3.3B5.0P8.7alloy. Proper additions of the non-magnetic copper element which has a positive heat of mixing with Fe, coupled with adequate annealing, can stimulate formation of ∼5 nm Fe ferromagnetic nanocrystals, which results in the increment in the saturation magnetization. Over-annealing which induced coarsening of the -Fe nanocrystals reduces the ferromagnetic exchange interaction between the nanosized -Fe crystals and increases the effective magneto-crystalline anisotropy, thereby deteriorating the soft magnetic properties.
Original languageEnglish
Article number052504
JournalApplied Physics Letters
Volume99
Issue number5
DOIs
Publication statusPublished - 1 Aug 2011
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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